Re: [Caml-list] Writing to argv[0]

[Dave Benjamin <dave@ramenlabs.com>]

On Fri, 10 Oct 2008, Jason Noakes wrote:

> Just be careful with that. You are copying over memory and you also 
> aren't doing any bounds checking. A long enough "Proctitle.setproctitle" 
> argument will corrupt your process.

Good point. Even a moderately long argument will corrupt the environment:

# Proctitle.setproctitle "Mary had a little lamb, whose fleece was white 
as snow.";;
- : unit = ()
# Unix.environment ();;
- : string array =
[|"little lamb, whose fleece was white as snow.";
   ", whose fleece was white as snow."; " was white as snow."; "w.";
   ...

That is why you not only need bounds checking but relocation of the 
environment to do this safely.

Thanks,
Dave